[devel] Added symbols.chk target to Makefile.am to validate symbols in png.h

against the new DEF file scripts/symbols.def.
Changed the default DEF file back to pngwin.def.
Removed makefile.mingw.

CHANGES

diff --git a/CHANGES b/CHANGES
index bcf024e..a73e1ef 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2601,7 +2601,11 @@
     platforms on which it happened (all but Mac OS and RISC OS).
   Moved the Mac OS test into pngpriv.h (the only place it is used.)
 
-version 1.5.0beta14 [March 14, 2010]
+version 1.5.0beta14 [March 16, 2010]
+  Added symbols.chk target to Makefile.am to validate the symbols in png.h
+    against the new DEF file scripts/symbols.def.
+  Changed the default DEF file back to pngwin.def.
+  Removed makefile.mingw.
 
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